<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <button id="connect">连接</button>
    <button id="send" disabled="true">发送数据</button><br>
    从服务端接收的数据如下：<br>
    <span id="recv"></span>
    <script>
        var connect = document.querySelector("#connect");
        var send = document.querySelector("#send");
        var recv = document.querySelector("#recv");
        let ws = null;
        connect.onclick = function () {
            ws = new WebSocket("ws://localhost:9998");
            ws.onopen = () => {
                console.log("连接服务端成功了");
                send.disabled = false
            }
            ws.onclose = () => {
                console.log("连接服务器失败");
                send.disabled = true
            }
            ws.onmessage = msg => {
                console.log("接收到从服务端发送过来的数据了");
                console.log(msg);
                recv.innerHTML = msg.data
            }
        }
        send.onclick = function () {
            ws.send(JSON.stringify({
                action: 'themeChange',
                socketType: 'themeChange',
                chartName: '',
                value: 'chalk'
            }));
        }
    </script>
</body>

</html>